Modify the line graph's color according to the data, displaying red for values above a certain threshold (such as 0) and blue for values below 0

I am currently tackling a challenge involving displaying a graph that corresponds to the temperature of an object. My objective is to highlight sections of the line graph in red when the object's temperature is above 0, and in blue when it falls below zero.

The graph I am trying to create bears resemblance to the one found at this link: http://bl.ocks.org/pranitar/01305d9ad0eba73dbf80

While I have succeeded in changing the color of the graph, I am encountering difficulties in restricting the color change to specific segments based on the threshold values. Currently, the entire graph switches to red or blue as new data is input in real-time. It is important to note that the graph is dynamic, meaning that data is continuously fed into the graph, causing it to constantly evolve and display the line graph accordingly.

I would greatly appreciate any assistance or guidance in resolving this issue.

For this project, I am solely utilizing JS and CSS and would prefer not to entertain suggestions for additional frameworks. Thank you.

javascriptcss

Answer №1

After spending nearly four hours experimenting with d3, I finally cracked the solution to this problem. The key was to incorporate a gradient into the line and specify the colors and coordinates at which the gradient would transition.

Check out a sample of the result after making this adjustment.

Watch the sample here

Below is the code snippet for achieving the same effect:

Add to the CSS:

.graph .group {
          fill: none;
          stroke: url(#line-gradient);
          stroke-width: 1.5;
      }

Add to the graph:

svg.append("linearGradient")
               .attr("id", "line-gradient")
               .attr("gradientUnits", "userSpaceOnUse")
               .attr("x1", 0).attr("y1", y(0))
               .attr("x2", 0).attr("y2", y(2))
               .selectAll("stop")
               .data(
                      [
                       {offset: "100%", color: "blue"},
                       {offset: "100%", color: "red"},
                      ]
                    )
                .enter().append("stop")
                        .attr("offset", function(d) { return d.offset; })
                        .attr("stop-color", function(d) { return d.color; });

To see the complete graph in action, visit: View the live graph here

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Creating a layout for Django comments and their accompanying replies in Django templates

I have successfully implemented a Comment model and views in my project. However, I am facing difficulty in organizing the templates to display replies corresponding to their respective comments. I would greatly appreciate it if you could guide me on how t ...

pythonhtmlcssdjango

The significance of having spaces in the PATH for npm

Attempting to set up gulp, but encountering the following error: module.js:471^throw err : cannot find module 'C:\c\Users\Joe's Steezy Laptop\AppData\Roaming\npm\node_modules\gulp-cli\bin\gul ...

javascriptnode.jsnpmpathgulp

How can JQuery be utilized to extract the information stored in the "value" parameter of a chosen option?

I have a dropdown menu that dynamically populates its options with numbers. Here is the code for that: <select name="TheServices" id="services-selector"> <option value="" disabled selected hidden>Static Select ...

javascripthtmljquery

Styles in print CSS are not effective in an Angular project

Currently, I am working on an Angular project where I need to generate a printable document using CSS. The challenge I am facing is ensuring that the date and title in the header do not print automatically when the document spans multiple pages. Additional ...

cssangularprinting

Array Not Receiving Excel Data

In my current project, I am dealing with a basic array structure, which can be seen in the visual representation below https://i.sstatic.net/gNbXa.png My goal is to extract the office codes contained in this array. To accomplish this task, I have opted t ...

javascriptarraysexceljs

Best practices for including jQuery in ASP.NET (or any other external JavaScript libraries)

Can you explain the distinctions among these three code samples below? Is there a preferred method over the others, and if so, why? 1.Page.ClientScript.RegisterClientScriptInclude(typeof(demo), "jQuery", Re ...

asp.netjavascriptjquery

Why is Ajax/FormData rounding my decimal values?

When sending data from a form to my PHP script, I am utilizing the new FormData() method to retrieve the values. However, there are additional values that I append later on which are not part of the form: var fd = new FormData(document.getElementById(&apo ...

javascriptphpajaxforms

The "main" entry for ts-node is not valid when running ts-node-dev

Recently, I embarked on a TypeScript project using yarn where I executed the following commands: yarn init -y yarn add typescript -D yarn tsc --init yarn add ts-node-dev -D Subsequently, I crafted a script titled dev that triggers tsnd src/index.ts, howev ...

javascriptnode.jstypescript

Turn off the incorrect TypeScript error detection

After setting up 'interact.js' using jspm and npm for TypeScript compatibility, I am encountering errors in my code: import { interact } from 'interact.js/interact' // ==> typescript error: TS2307: Cannot find module 'interact. ...

javascriptnode.jstypescriptinteract.js

Steps to display a full-page loader/spinner prior to the completion of loading a React application

What is the best way to create a full-page loader/spinner that will be displayed until a React (or other JS-based framework) app is fully loaded? By "fully loaded," I mean when the browser's spinner stops spinning. I have experience creating loaders ...

javascripthtmlcssreactjsweb-applications

Passing variables in Redirect() without exposing them in the URL; a methodical approach

After scouring the depths of the internet, I have been on a quest to figure out how to seamlessly redirect to a new page on my site while discreetly passing a variable without exposing it in the URL like so: www.test.com/?variable=dont.want.this.here I a ...

javascripthtmlnode.js

Is it feasible to verify for vacant dates with a single click?

Is there a way to determine if a date value is empty, and if it is, display a popup indicating so? After some research, I stumbled upon a similar issue where the date value was always filled with a default "mm/dd/yyyy" value. The solution provided involv ...

javascripthtml

Is there a way to ensure one request completes before allowing another to be executed in Express/Node?

I am currently working on a task that involves fetching data from a third-party API (iTunes) to search for content provided by the API. The backend, which is handled by Express and Node, will interact with this third-party API. My goal is to trigger a POST ...

javascriptnode.jsreactjsexpress

Retrieve the overall number of Formik errors for a specific field array

In the given Yup validation setup below, there is a nested Formik FieldArray: parentLevel: Yup.array().of( Yup.object({ childrenLevel: Yup.array().of( Yup.object({ childName: Yup.string().required('Name is required') ...

javascriptreactjsformikyup

Accessing the Bootstrap tab form from an external source

I currently have Bootstrap tabs on a page and they are functioning correctly. However, I am looking to open these tabs from an external page. Is this feasible? <div role="tabpanel"> <ul class="nav nav-tabs" role="tablist"> ...

javascriptjqueryangularjshtmltwitter-bootstrap

Exclude a particular row from a table when there is no identifier

My PHP code generates a basic table. <table border="1" id="control> <tbody> <tr>...</tr> <tr>...</tr> <tr>...</tr> //Row #3 <tr>...</tr> <tr>... ...

javascripthtmlcss

Currently, there is a requirement to include past build outcomes in the HTML test report within the playwright

Is there a way to display the previous build status of each test case for every test case? I have been attempting to use test.info() in playwright, but it seems inaccessible from onTestEnd. One option could be to retrieve the previous build data from Jenki ...

javascripttypescriptui-automationplaywrightplaywright-test

How can I extend the input field length in the form to make it appear more compact?

<div formGroupName="xxxx" class="form-row"> <div class="form-group col-md-3"> <mat-form-field class="row-styling"> <mat-label> Mobile Number </mat-label> <input matInput phoneNumberOnly ...

htmlcssangularbootstrap-4

Which is the more appropriate option to use in JavaScript: "this" or "event.target"?

Take a look at the simple demonstration below. It showcases a div element that will disappear when clicked. <div id="three" onclick="toggle2(event);return false;" style="background:#303; color:#FFF;"> function toggle2(e) { var textx = (e.targe ...

javascripteventsthistarget

"Removing the default background color in the latest version of next.js: A step-by

Check out this screenshot for reference Whenever I change the gradient color in next.js, it defaults to these lines. However, switching to a blue or green color fixes the issue. The problem arises when using my current background color code: background: ...

cssreactjsnext.jsstyles